PHS 4601 Lecture Notes - Lecture 2: Talc, Ph Indicator, Zinc Oxide

• School: St. John's University
• Department: PHS - PHARMACEUTICAL SCIENCES
• Course: PHS 4601
• Professor: Shao Lin

Document Summary

Intimate mixtures of dry, finely divided drugs and/or chemicals that may be intended for internal (oral powders) or. Drugs unstable in water may be prepared in powders or granules. Oral powders may be dispensed in pre-measured doses (1 package = 1 dose) or as bulk powders. Bulk powders are limited to non-potent drugs (patient will make aliquots of the package). Dusting powders are intended for topical use (passing at least 100-mesh sieve or 0. 149 mm) Readily disperse or dissolve (as opposed to granules or capsules/tablets which need to be disintegrated first) Easy to take: swallow problem (make suspension and drink it- esp good for pediatrics) Easy to take when the dose is large (a large dose would require a larger capsule and this is harder to swallow. With powders you can dissolve a large batch in a glass of water) More stable than liquid dosage form (more elastic)